Dumbarton moved level on points with Stenhousemuir after an away win over their nine-man play-off rivals.
The home side had a disastrous opening period to the game with defender Ross McMillan and left wing-back Kevin McKinlay both dismissed inside 33 minutes.
McMillan received his second red card of the season for a professional foul on Bryan Prunty after 10 minutes, before McKinlay committed his second bookable offence just after the half-hour mark.
The visitors made their numerical advantage count just three minutes later, defender Alan Lithgow heading home Mark Gilhaney's inswinging corner.
A calamitous first half for the Warriors was compounded moments before half-time, Mike Devlin deflecting Prunty's effort into his own net.
Substitute Gary Smith pulled a goal back 14 minutes from time, but the nine men were unable to complete an unlikely comeback.
Stenhousemuir: Brown, Lyle, Devlin, McMillan, McKinlay, Ferguson (McHale 16), Paton (Gary Smith 67), Iain Thomson, Dickson, Rodgers (Campbell 72), Kean. Subs Not Used: Diamond, Lawson.
Sent Off: McMillan (10), McKinlay (33). Booked: McKinlay, Lyle, Iain Thomson.
Goals: Gary Smith 76.
Dumbarton: Grindlay, Finnie, Nugent, Lithgow, Creaney (Graham 62), Gilhaney, Wallace, McNiff, Walker (Lamont 62), Prunty, Agnew. Subs Not Used: Gastal, Borris, Kennedy.
Goals: Lithgow 36, Devlin 45 og.
Ref: John Beaton